Pls help with this “can get 16 points!”
Explanation:
I believe mitosis is the answer
please mark me brainliest
How does an adaptation begin?
In evolutionary theory, adaptation is the biological mechanism by which organisms adjust to new environments or to changes in their current environment.
Answer:
adaptation is the biological mechanism by which organisms adjust to new environments or to changes in their current environment. .
Explanation:
brainlesttttttt is apprciated
Hi please may someone help me
Choose the answer that best explains why Orion is important to star watchers.
Orion is located on the celestial equator. Its location causes the rest of the stars to appear to revolve around Orion as the Earth rotates.
Since Orion can be seen in both the Southern and Northern Hemispheres it is useful for finding north in the night sky.
Orion, the hunter, was an important figure in Greek Mythology making the constellation of central importance to astronomers.
Orion is easy to locate, it can be seen in both hemispheres and is helpful for locating prominent stars, nebulas and surrounding constellations.
Answer:
Orion is located on the celestial equator. Its location causes the rest of the stars to appear to revolve around Orion as the Earth rotates.
Explanation:
The above stated statement is the reason why those who watches for stars commonly called the star watchers use the Orion as their base point in star observation. Without this, it would be difficult to trace the stars or know the exact ones which appears on the sky.
When sediment is eroded and then deposited at the mouth of a river, it can form a
Answer:
fossil?..................
Help!!!!
What is the atom with 10 kernel electrons and 5 valence electrons?
and
What has a + 1 charge and has 8 valence electrons in the third major energy level?
Answer:
!atoms in the nitrogen family.. have 5 valence electrons. They tend to share electrons when they bond. Other elements in this family are phosphorus, arsenic, antimony, and bismuth.
Light has both magnetic and electric fields. Scientists call this *
Answer:
I think is electromagnetic radiation (light)
Explanation:
If i get it wrong i am sorry
(Hurry ASAP!!!) There are 1.5 moles of methane (CH4) in a tank. It has a pressure of 4.4 atm at 173°C. Find the volume occupied by the gas.
Answer:
hope this help !
Explanation:
Use the given functions to set up and simplify 173 ° C .
1.5 =
CH4 = CH4
4.4 = CH4
173 ° C = CH4
Which compound is insoluble in water?
A) calcium bromide
B) potassium bromide
C) silver bromide
D) sodium bromide
Answer:
C) silver bromide
Explanation:
Calcium bromide is incorrect.
The compound which is insoluble in water is silver bromide (AgBr).
Which compounds are insoluble in water?Those compounds which have high attraction force between their constitutes ions as compare to ions between the water and compounds are insoluble in water.
Among given compounds all are soluble in water except silver bromide, because silver is having high nuclear charge than other given alkali metals as calcium, potassium and sodium. So it tightly attracts the bromide ion towards itself and this attraction is more than the attraction between the H⁺ ion of water and bromide ion, as a result of which it is insoluble in water.
Hence, option (C) is correct i.e. silver bromide.
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How can the speed of solvent molecules be slowed down?
A. by increasing the temperature
B. by increasing the surface area of the solute
C. by increasing the pressure
D. by decreasing the temperature
E. by decreasing the surface area of the solute
A. by increasing the temperature
B. by increasing the surface area of the solute
C. by increasing the pressure
D. by decreasing the temperature
E. by decreasing the surface area of the solute
An inflated balloon is left outside overnight. initially it has a volume of 1.84 L when the temperature is 293.4 K and the pressure. what temperature will the balloon have a volume of 1540mL. If the pressure falls to 14.41 psi?
Answer:
ffff
Explanation:
which form of energy does a cheeseburger have
Answer:
chemical potential energy - It mainly has chemical potential energy, this is really a type of electrical potential energy stored in the chemical bonds of the molecules
Explanation:
You can give the other person brainliest, I don't need it! :)
When there are 165.0grams of reactants, what is the mass of the products for that reaction?
Answer:
165.0 grams
Explanation:
The law of conservation of mass tells us that the mass of the reactants will be equal to the mass of the products. Therefore, if we begin with 165.0 grams of mass, that is how much there will be at the end in the products, even if it's in different forms.
Concentrated hydrochloric acid is 12.0 M. What volume of this concentrated
solution would be needed to mix with water to produce 100. mL of 5.0 M. (Hint: the
number of moles in the diluted solution must be the same as the number of moles
from the concentrated solution.)
Answer:
41.67 ml HCl
Explanation:
n = M x V
Since the number of moles is the same:
M1 x V1 = M2 x V2
V1 = M2 x V2 /M1 =(0.1 L x 5.0 M) / 12.0 M = 0.041667 L = 41.67 ml
What is the molar mass of AuCl₃?
Answer:
molar mass of Aucl3
is 303.33 g/ mol
How many atoms are in 9.3moles of lithium?
Answer:
3.45 moles Li contains 2.08 × 10 (to the power of)24 atoms .
Explanation:
The relationship between atoms and moles is:
1 mole atoms =
6.022 × 10 (to the power of)23
atoms
In order to determine how many atoms occupy a given number of moles, multiply the given moles by
6.022 × 10 (to the power of)23
atoms/mole
.
In the case of 3.45 moles lithium (Li):
3.45 mol Li × 6.022 × 10 (to the power of)23 atoms Li/ 1 mol Li =
2.08 × 10 (to the power of)24
atoms Li rounded to three
Answer: 3.45 moles Li contains 2.08 × 10 (to the power of)24 atoms
Explanation:
If there is no subscript on an element symbol there is/are __________________ atom(s) of that element.
Answer:
If there is no subscript written after a symbol that means there is one atom of that element present
Explanation:
correct me if I'm
If there is no subscript on an element's chemical symbol there is one atom of that element.
What is an element ?
It is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.
Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.
The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.Elements combine to form compounds.
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Metals in group 2 of the periodic table form ionic bonds in a one-to-one ratio with nonmetals in group ______.
15
15
16
16
17
17
18
18
Answer:
7
Explanation:
Bec g1 has to lose one electron and g7 has to gain one electron
How is an ion formed
What 2 subatomic particles are found in the nucleus?
Answer:
Protons and Neutrons
Explanation:
Thats it
What are most semiconductors made from? iron copper aluminum silicon
Answer:
silicon
Explanation:
Silicon is at a higher level than germanium, tin, and lead.
Most semiconductors are made up of silicon. Thus, the correct option for this question is D.
What are semiconductors?A Semiconductor may be defined as a type of solid substance that possesses an electrical conductivity between that of an insulator and a conductor. It has a specific electrical property that allows it to function as a foundation for computers and other electronic devices.
Silicon is the most widely utilized in the manufacturing of semiconductors. Apart from this, germanium, gallium, and arsenide are also used. Among all these elements, germanium was one of the earliest semiconductors material used.
Semiconductors are widely used in the production of Integrated circuits (ICs) and electronic discrete components such as diodes and transistors.
Therefore, most semiconductors are made up of silicon. Thus, the correct option for this question is D.
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5. What percentage of energy generation is
produced by fossil fuels? sc.7.P.11.2
A 19.5%
B 33.2%
© 66.9%
D 86.4%
Answer:
i think it's B maybe..I'm not sure
What is the volume of SO3 in 835 g SO3?
J
Question 3
A student is a passenger in the front seat of a moving car. Which object is the best
frame of reference for the student to determine how fast the car is moving relative to
the ground?
O a person sitting in the backseat of the car
O a truck traveling in the lane next to the car
o the driver sitting next to the student
O a signpost on the side of the road
Answer:
a truck traveling in the lane next to the car
Explanation:
because if you look down for any car (but talking about a truck) that looks like its going fast and look at the road of the ground and then you will acctuly see how fast its moving. Hope that help you!
The concentration of lead ion in a water sample is 5ppb. Calculate the amount of lead ion in 2000g of this water sample?
Answer:
10 μg or 1 x 10⁻⁵ g
Explanation:
The concentration of lead ion is given in parts by billion (ppb), which means that there are 5 micrograms (μg) of lead in 1 liter of water sample:
5 ppb = 5 μg lead ion/L
If we assume that the density of the water sample is equal to 1 g/ml (density of water at 25°C), we can say that 2000 g of sample is equal to 2000 mL:
sample volume = 2000 g x 1 mL/g = 2000 mL x 1 L/1000 mL = 2 L
Thus, the amount of lead ion in 2000 g (or 2 L) of water sample is:
mass of lead ion = 5 μg lead/L x 2 L = 10 μg x 1 g/10⁶μg = 1 x 10⁻⁵ g
PLEASE ASAP
This chemical equation represents a chemical equation.
2HNO3 + Na2SO3 → 2NaNO3 + H2O + SO2
Which chemical is a reactant in the reaction?
a. H2O
b. Na2SO3
c. SO2
d. NaNO3
Answer:
B. Na2SO3 is one of the reactants
Explanation:
Answer: B. Na2SO3
Explanation:
A reactant is always left to the arrow and is a substance that is at the start of a chemical reaction (before the reaction / change occurs)
N2 + 3H2 + 2NH3 .
28.0 grams of N2 and 5.04 grams of H2 are reacted, producing 17.8 grams of NH3. What is the percent yield?
1. 62.9%
2. 84.0%
3. 52.4%
4. Not enough information is given.
5. 34.0%
6. 14.7%
7. 191%
If 28.0 grams of N2 and 5.04 grams of H2 are reacted, producing 17.8 grams of NH3. the percent yield is 52.4%. Therefore, the answer is option 3,
To calculate the percent yield, we first need to calculate the theoretical yield of NH3 based on the amounts of N2 and H2 that were reacted.
The balanced chemical equation for the reaction is:
N2 + 3H2 → 2NH3
From the equation, we can see that 1 mole of N2 reacts with 3 moles of H2 to produce 2 moles of NH3. Therefore, the moles of N2 and H2 reacted can be calculated as:
moles of N2 = mass of N2 / molar mass of N2
= 28.0 g / 28.014 g/mol
= 0.999 mol
moles of H2 = mass of H2 / molar mass of H2
= 5.04 g / 2.016 g/mol
= 2.5 mol
Since N2 is the limiting reactant (its mole value is less than H2's mole value), we can calculate the amount of NH3 produced based on the mole ratio of N2 and NH3:
moles of NH3 = 2/1 x moles of N2
= 2/1 x 0.999 mol
= 1.998 mol
The theoretical yield of NH3 can be calculated from its mole value:
mass of NH3 = moles of NH3 x molar mass of NH3
= 1.998 mol x 17.031 g/mol
= 34.06 g
Now, we can calculate the percent yield by dividing the actual yield (17.8 g) by the theoretical yield (34.06 g) and multiplying by 100:
percent yield = actual yield / theoretical yield x 100%
= 17.8 g / 34.06 g x 100%
= 52.24%
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Under each DNA sequence write the complimentary mRNA base sequence that each of these gene fragments would produce. Remember that in the production of mRNA, the DNA base sequence "A" _________________ specifies the RNA base ____________________
Answer:
The correct answer would be -
Thymine to adenine
Cytosine to guanine
guanine to cytosine
Adenine, and "U" uracil respectively.
Explanation:
mRNA is a sequence of complementary base sequences encoded from a gene or DNA segment which is used to produce the protein by the process called translation.
From converting a sequence from DNA to its complementary mRNA sequence, the rules of complementary base pairing will be applied: Cytosine (C) is replaced with Guanine (G) – and vice versa. Uracil (U) is replaced by Adenine (A) and Thymine is replaced by adenine.
What distinguishes an element from all other elements
Answer:
Elements are distinguished from one another by their atomic numbers. No two elements have the same atomic number. It is the atomic number, and therefore the number of protons in its atomic nuclei, that define an element.
Why are we pulled to the center of the Earth and not into the much larger sun?
Answer:
The sun's gravity pulls on the earth, and the earth pulls back on the sun at the same time. This is why the center of the solar system is not the center of the sun. As one gravitational body gets bigger than the other, it circles closer to the center of the system (shown in red).
Explanation:
hope this helps...
The earth is known to be falling towards the sun as a result of intense gravity. The earth is known to have plenty of sideways momentum and due to this sideways momentum, the earth is often falling towards the sun and missing it.
The reason we are pulled to the center of the Earth and not into the much larger sun by gravity is that all objects with mass, like our Earth, do bend and curve the fabric of the universe referred to as spacetime.
At most, the gravity from the sun result in our planet moving in a curved, elliptical path. but, the planets are moving fast enough so that they are not pulled into the sun.
The sun has a more weaker gravity and as it loses mass, it causes the Earth to slowly move away from it.
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